When you have added custom animations in the Animation Manager then the software has created a user specific configuration file 'animations.dat' in the folder: Documents\WYSIWYG Web Builder\system
This means that if you install a new version which has extra animations, those will not be visible because the application will use the personal animations file.
To include the extra animations, you can copy the items from the file Program Files\WYSIWYG Web Builder\animations.dat (XML format).